Boiler construction



1949; j F. BERWANGER 7 8 0 BOILER CONSTRUCTION Filed July 7, 1945 I s Sheets-Shee t *1 Eg g Frank Berg/c0722- 1949- F. BERWANGER BOILER CONSTRUCTION Filed July 7, 1945 3 Sheets-Sheet 2 fnynfur rank Bern/ x2 72;-

Z7 Figs F. BERWANGER BOILER CONSTRUCTION Aug. 30, 1949.

3 Sheets-Sheet 3 Filed July 7, 1945 JYI EHZ UP Frank Berw'dz z 'er E .7

Patented Aug. 30, 1949 UNITED S ATES PATENT OFFICE 2,480,440 7 BOILER CONSTRUCTION Frank Berwanger, Dubuque, Iowa Application July 7, 1945', Serial No. 603,603

My invention relates to steam boilers, particularly to improved construction thereof which will facilitate assembly and reduce the cost of construction.

, An object is to provide an improved boiler construction which is easy to assemble and install.

An important object of the invention is to provide a boiler which can be constructed substantially entirely of seamless pipe ortubing members connected together, as by welding, to provide the various water or steam fiow passages.

A further object is to construct a metallic skeleton structure in the form of seamless tubing parts connected to provide the various water and steam flow passageways, and with brick, tile, and plastic or other material, associated with this skeleton frame to form a firebox, flue passageways and other passageways for the flow of products of combustion.

In accordance with the features of this invention there is to provide a supporting structure for a firebox and combustion chamber comprising a horizontal row of inverted U- or archshaped elements in the form of seamless tubing and with addition-a1 tube members extending upwardly from the arch members for supporting a steam dome or tank and for defining with the arch members an outlet flue passageway to Smokestack for the products of combustion from the firebox and combustion chamber.

The above referred to and other features of the invention are embodied in the structure shown on the drawings, in which:

Figure l is a transverse section through my boiler structure on plane II of Figure 2;

Figure 2 is a section on plane IIII of Figure 1;

Figure 3 is a section on plane III-III of Figure 1; and

Figure 4 is a fragmentary section on plane IV-IV of Figure 1. I

The metallic skeleton supporting structure for the boiler comprises th horizontally extending base members II] and I I each in the form of a length of seamless tubing, and the base members being cross connected by a number of tube members I2. The front end of the base tube III may be closed as by end walls I3, while the rear end of the tube may be closed by removable cover structures I4. A water inlet pipe I5 connects with the front end of the base tubes I0 and I I.

Mounted on and spanning the base tubes I0 and II is a row of inverted U- or arch-shaped members I6 each in the form of a length of seamless tubing. Extending upwardly from each arch member It at the middle thereof is a tube I1.

1 Claim. (Cl. 122-328) From the opposite corners of each arch member I6 tubes I8 and I9 extend diagonally inwardly, and the tubes I'I, I8 and I9 form supports for a steam dome or tank 20, Figures 1 and 2.

The boiler structure is mounted on a cement floor or foundation 2P The vertical portions of the arch members It are embedded in sidewall structures of preferably fireproof or ceramic material. As shown, the inner portion 2| of the side walls may be formed of firebrick and the outer portion 22 of tile. These side wall structures are connected at their ends by the front and rearend wall structures 23 and 24 and these wall structures may embed the front and rear cross tubes I2, as shown on Figures 3 and 4. The walls 23 and 24 may be of firebrick and may be faced on their outer sides by tile 25. These tile facings 25 extend between the front and rear ends of the tile portions or facings 22 of the side wall structures 2|. Extending between the tops of the side Wall 2| and across and partially embedding the upper portions of the arch members I6 is the wall 26 (Figures 1 and 2) which is preferably of firebrick. This wall 26 forms the roof of the boiler fire and combustion space. Extending across this space is a fire wall 21 pref rably of firebrick, and in this wall the middle cross tube I2 may be embedded. This fire wall is between the fire pot chamber 28 and the combustion chamber 29. The fuel feed opening 3|] is provided through the front wall 25 (Figure 3).

An outer wall or shell, which may be of plastic material, has the front and rear end walls 28 and 29 and the side walls 30 and 3|. The side walls 30 and 3| extend along and against the outer side of the tubes I8 and I9 and with the end Walls of the shell define the flue passageway 32 leading at one end to the smokebox 33 (Figure 2) from which the Smokestack 34 extends. At the rear end of the boiler an outflow passage 35 (Figures 2 and 4) is provided for fiow of the products of combustion through the flue passage and to the chimney. The products of combustion from the firebox and the combustion chamber flow along the undersurface of the upper portion of the arch tubes I5 and through the passage .35 into the flue passageway, these products of combustion serving to heat, by contact, the tubes IT, IS and I9. The water maintained in the arch members and in the tubing II, I8 and I9 to a predetermined level, will thus be heated by the products of combustion and converted into steam which flows into the steam tank or dome 20. The side and end walls of the shell structure may extend around the tank, as shown 3 at 36, and also around the smokebox 33, as shown at 31 (Figures 1 and 2).

The main steam outlet 38 is provided for the steam tank and nipples 39 may serve to support safety valves or other structure (Figures 1 and 2). Provision is made for superheating part of the steam. A pipe 40 extends from the steam tank for delivering steam to the superheater loop 4| extending through the flue passageway 32, the-ends ofxtheiloop extending through the end wall 29 for delivery of thesuperheated steam (Figure 1). A steam gauge 42 is connected with the steam tank and a gauge 43 will indicate the water level in the boiler structure.

Provision is made for washing out the water passageways of the boiler structure. Eor this purpose pipes 44 extend through theabasentubes l and H (Figure 2) and have orifices 45 '(Figure 1) for directing steam, water or other-cleaning fluid under pressure from the pipe 44 into l'zthaanchvtubes. ;=.As ShOWlLOH Figure 2;:the,base tubes '1 0 and :l iaincline-slightly rearwardlyrso that a during a washing operation thewashedout'- material may "*fiow down-ion: discharge. through: a

:ztubeMG into-:thewsewer. -A--valve i(not shown) :xcouldr-be; provided-tor the drain* tube -46-. souit z'couldbe closecbduring service operation of-.-.the -boiler.

Irhaye thusmroduced a= simplified but efficient ment of the features of my invention, but I do not desire to be limited to the exact construction or arrangement shown and described, as changes and modifications may be made without departing from the scope of the invention as defined in the appended claim.

I claim as my invention:

A boiler structure comprising a plurality of inverted U-shaped water tubes, a steam drum spaced vertically. above thearch bi said U -shaped tubes; laterallyarranged upwardly converging tubes forming upper continuations of the verti- "cal legs of the U-shaped tubes and opening into -ssaid drum on opposite sides of the bottom thereof, vertical tubes connecting the upper parts of -the'bigh-ts of said U-shaped tubes to the bottom woiisaiddrum said laterally arranged and vertical tubes constituting the support for said steam drum, continuous lateral walls enclosing said vertical legs and said upwardly converging tubes and asegmental,cylindricalvwall,surrounding the upperpportion of said drum and continuous :with said elateral walls-to. concentrate the heat; of the combustion gases against the undersidemhsaid i .drum.

\ FRAN K BERWANGER.

REFERENCES CITED 1 The iollowinglwrefierences. aremf record -in,1the

wboilerwstructurer which :can: beeconomically, con- .3 11 of this; t

'structemofvlengths'of ordinary steel piping or .wseam-less tubingshaped;v and connected together =-:to form the-,skeletonronsupporting-frame :work nfor rthe boiler istructure-tand-at the-same stime cproviding :the flowpassageways 'for the water. to

abs; converted into steam.

-; Lhave shown a practical-and eflicient embodi- UNITED "STATES "PATENTS "Number ,;-Name vDate ;--Re-i 6 893 L-Densmore -Feb.- 1,:71876 4349003 ---Renshaw 1 .i-Dec. l7,-'18.-72 r 2,226,076 ,-Rutledge .-Dec, 4, 1940 l 2,306,097 Wallin nos-Dec. 22,- 1952 

